1 b8c14089 2003-11-23 devnull #include <u.h>
  2 b8c14089 2003-11-23 devnull #include <libc.h>
  3 b8c14089 2003-11-23 devnull #include <bio.h>
  4 b8c14089 2003-11-23 devnull #include <regexp.h>
  5 b8c14089 2003-11-23 devnull #include <thread.h>
  6 b8c14089 2003-11-23 devnull #include <plumb.h>
  7 b8c14089 2003-11-23 devnull #include "plumber.h"
  8 b8c14089 2003-11-23 devnull 
  9 32f69c36 2003-12-11 devnull /*
 10 b8c14089 2003-11-23 devnull static char*
 11 b8c14089 2003-11-23 devnull nonnil(char *s)
 12 b8c14089 2003-11-23 devnull {
 13 b8c14089 2003-11-23 devnull 	if(s == nil)
 14 b8c14089 2003-11-23 devnull 		return "";
 15 b8c14089 2003-11-23 devnull 	return s;
 16 b8c14089 2003-11-23 devnull }
 17 32f69c36 2003-12-11 devnull */
 18 b8c14089 2003-11-23 devnull 
 19 b8c14089 2003-11-23 devnull int
 20 b8c14089 2003-11-23 devnull verbis(int obj, Plumbmsg *m, Rule *r)
 21 b8c14089 2003-11-23 devnull {
 22 b8c14089 2003-11-23 devnull 	switch(obj){
 23 b8c14089 2003-11-23 devnull 	default:
 24 b8c14089 2003-11-23 devnull 		fprint(2, "unimplemented 'is' object %d\n", obj);
 25 b8c14089 2003-11-23 devnull 		break;
 26 b8c14089 2003-11-23 devnull 	case OData:
 27 b8c14089 2003-11-23 devnull 		return strcmp(m->data, r->qarg) == 0;
 28 b8c14089 2003-11-23 devnull 	case ODst:
 29 b8c14089 2003-11-23 devnull 		return strcmp(m->dst, r->qarg) == 0;
 30 b8c14089 2003-11-23 devnull 	case OType:
 31 b8c14089 2003-11-23 devnull 		return strcmp(m->type, r->qarg) == 0;
 32 b8c14089 2003-11-23 devnull 	case OWdir:
 33 b8c14089 2003-11-23 devnull 		return strcmp(m->wdir, r->qarg) == 0;
 34 b8c14089 2003-11-23 devnull 	case OSrc:
 35 b8c14089 2003-11-23 devnull 		return strcmp(m->src, r->qarg) == 0;
 36 b8c14089 2003-11-23 devnull 	}
 37 b8c14089 2003-11-23 devnull 	return 0;
 38 b8c14089 2003-11-23 devnull }
 39 b8c14089 2003-11-23 devnull 
 40 b8c14089 2003-11-23 devnull static void
 41 b8c14089 2003-11-23 devnull setvar(Resub rs[10], char *match[10])
 42 b8c14089 2003-11-23 devnull {
 43 b8c14089 2003-11-23 devnull 	int i, n;
 44 b8c14089 2003-11-23 devnull 
 45 b8c14089 2003-11-23 devnull 	for(i=0; i<10; i++){
 46 b8c14089 2003-11-23 devnull 		free(match[i]);
 47 b8c14089 2003-11-23 devnull 		match[i] = nil;
 48 b8c14089 2003-11-23 devnull 	}
 49 32f69c36 2003-12-11 devnull 	for(i=0; i<10 && rs[i].s.sp!=nil; i++){
 50 32f69c36 2003-12-11 devnull 		n = rs[i].e.ep-rs[i].s.sp;
 51 b8c14089 2003-11-23 devnull 		match[i] = emalloc(n+1);
 52 32f69c36 2003-12-11 devnull 		memmove(match[i], rs[i].s.sp, n);
 53 b8c14089 2003-11-23 devnull 		match[i][n] = '\0';
 54 b8c14089 2003-11-23 devnull 	}
 55 b8c14089 2003-11-23 devnull }
 56 b8c14089 2003-11-23 devnull 
 57 b8c14089 2003-11-23 devnull int
 58 b8c14089 2003-11-23 devnull clickmatch(Reprog *re, char *text, Resub rs[10], int click)
 59 b8c14089 2003-11-23 devnull {
 60 b8c14089 2003-11-23 devnull 	char *clickp;
 61 b8c14089 2003-11-23 devnull 	int i, w;
 62 b8c14089 2003-11-23 devnull 	Rune r;
 63 b8c14089 2003-11-23 devnull 
 64 b8c14089 2003-11-23 devnull 	/* click is in characters, not bytes */
 65 b8c14089 2003-11-23 devnull 	for(i=0; i<click && text[i]!='\0'; i+=w)
 66 b8c14089 2003-11-23 devnull 		w = chartorune(&r, text+i);
 67 b8c14089 2003-11-23 devnull 	clickp = text+i;
 68 b8c14089 2003-11-23 devnull 	for(i=0; i<=click; i++){
 69 b8c14089 2003-11-23 devnull 		memset(rs, 0, 10*sizeof(Resub));
 70 b8c14089 2003-11-23 devnull 		if(regexec(re, text+i, rs, 10))
 71 32f69c36 2003-12-11 devnull 			if(rs[0].s.sp<=clickp && clickp<=rs[0].e.ep)
 72 b8c14089 2003-11-23 devnull 				return 1;
 73 b8c14089 2003-11-23 devnull 	}
 74 b8c14089 2003-11-23 devnull 	return 0;
 75 b8c14089 2003-11-23 devnull }
 76 b8c14089 2003-11-23 devnull 
 77 b8c14089 2003-11-23 devnull int
 78 b8c14089 2003-11-23 devnull verbmatches(int obj, Plumbmsg *m, Rule *r, Exec *e)
 79 b8c14089 2003-11-23 devnull {
 80 b8c14089 2003-11-23 devnull 	Resub rs[10];
 81 b8c14089 2003-11-23 devnull 	char *clickval, *alltext;
 82 b8c14089 2003-11-23 devnull 	int p0, p1, ntext;
 83 b8c14089 2003-11-23 devnull 
 84 b8c14089 2003-11-23 devnull 	memset(rs, 0, sizeof rs);
 85 b8c14089 2003-11-23 devnull 	ntext = -1;
 86 b8c14089 2003-11-23 devnull 	switch(obj){
 87 b8c14089 2003-11-23 devnull 	default:
 88 b8c14089 2003-11-23 devnull 		fprint(2, "unimplemented 'matches' object %d\n", obj);
 89 b8c14089 2003-11-23 devnull 		break;
 90 b8c14089 2003-11-23 devnull 	case OData:
 91 b8c14089 2003-11-23 devnull 		clickval = plumblookup(m->attr, "click");
 92 b8c14089 2003-11-23 devnull 		if(clickval == nil){
 93 b8c14089 2003-11-23 devnull 			alltext = m->data;
 94 b8c14089 2003-11-23 devnull 			ntext = m->ndata;
 95 b8c14089 2003-11-23 devnull 			goto caseAlltext;
 96 b8c14089 2003-11-23 devnull 		}
 97 b8c14089 2003-11-23 devnull 		if(!clickmatch(r->regex, m->data, rs, atoi(clickval)))
 98 b8c14089 2003-11-23 devnull 			break;
 99 32f69c36 2003-12-11 devnull 		p0 = rs[0].s.sp - m->data;
100 32f69c36 2003-12-11 devnull 		p1 = rs[0].e.ep - m->data;
101 b8c14089 2003-11-23 devnull 		if(e->p0 >=0 && !(p0==e->p0 && p1==e->p1))
102 b8c14089 2003-11-23 devnull 			break;
103 b8c14089 2003-11-23 devnull 		e->clearclick = 1;
104 b8c14089 2003-11-23 devnull 		e->setdata = 1;
105 b8c14089 2003-11-23 devnull 		e->p0 = p0;
106 b8c14089 2003-11-23 devnull 		e->p1 = p1;
107 b8c14089 2003-11-23 devnull 		setvar(rs, e->match);
108 b8c14089 2003-11-23 devnull 		return 1;
109 b8c14089 2003-11-23 devnull 	case ODst:
110 b8c14089 2003-11-23 devnull 		alltext = m->dst;
111 b8c14089 2003-11-23 devnull 		goto caseAlltext;
112 b8c14089 2003-11-23 devnull 	case OType:
113 b8c14089 2003-11-23 devnull 		alltext = m->type;
114 b8c14089 2003-11-23 devnull 		goto caseAlltext;
115 b8c14089 2003-11-23 devnull 	case OWdir:
116 b8c14089 2003-11-23 devnull 		alltext = m->wdir;
117 b8c14089 2003-11-23 devnull 		goto caseAlltext;
118 b8c14089 2003-11-23 devnull 	case OSrc:
119 b8c14089 2003-11-23 devnull 		alltext = m->src;
120 b8c14089 2003-11-23 devnull 		/* fall through */
121 b8c14089 2003-11-23 devnull 	caseAlltext:
122 b8c14089 2003-11-23 devnull 		/* must match full text */
123 b8c14089 2003-11-23 devnull 		if(ntext < 0)
124 b8c14089 2003-11-23 devnull 			ntext = strlen(alltext);
125 32f69c36 2003-12-11 devnull 		if(!regexec(r->regex, alltext, rs, 10) || rs[0].s.sp!=alltext || rs[0].e.ep!=alltext+ntext)
126 b8c14089 2003-11-23 devnull 			break;
127 b8c14089 2003-11-23 devnull 		setvar(rs, e->match);
128 b8c14089 2003-11-23 devnull 		return 1;
129 b8c14089 2003-11-23 devnull 	}
130 b8c14089 2003-11-23 devnull 	return 0;
131 b8c14089 2003-11-23 devnull }
132 b8c14089 2003-11-23 devnull 
133 b8c14089 2003-11-23 devnull int
134 b8c14089 2003-11-23 devnull isfile(char *file, ulong maskon, ulong maskoff)
135 b8c14089 2003-11-23 devnull {
136 b8c14089 2003-11-23 devnull 	Dir *d;
137 b8c14089 2003-11-23 devnull 	int mode;
138 b8c14089 2003-11-23 devnull 
139 b8c14089 2003-11-23 devnull 	d = dirstat(file);
140 b8c14089 2003-11-23 devnull 	if(d == nil)
141 b8c14089 2003-11-23 devnull 		return 0;
142 b8c14089 2003-11-23 devnull 	mode = d->mode;
143 b8c14089 2003-11-23 devnull 	free(d);
144 b8c14089 2003-11-23 devnull 	if((mode & maskon) == 0)
145 b8c14089 2003-11-23 devnull 		return 0;
146 b8c14089 2003-11-23 devnull 	if(mode & maskoff)
147 b8c14089 2003-11-23 devnull 		return 0;
148 b8c14089 2003-11-23 devnull 	return 1;
149 b8c14089 2003-11-23 devnull }
150 b8c14089 2003-11-23 devnull 
151 b8c14089 2003-11-23 devnull char*
152 b8c14089 2003-11-23 devnull absolute(char *dir, char *file)
153 b8c14089 2003-11-23 devnull {
154 b8c14089 2003-11-23 devnull 	char *p;
155 b8c14089 2003-11-23 devnull 
156 b8c14089 2003-11-23 devnull 	if(file[0] == '/')
157 b8c14089 2003-11-23 devnull 		return estrdup(file);
158 b8c14089 2003-11-23 devnull 	p = emalloc(strlen(dir)+1+strlen(file)+1);
159 b8c14089 2003-11-23 devnull 	sprint(p, "%s/%s", dir, file);
160 b8c14089 2003-11-23 devnull 	return cleanname(p);
161 b8c14089 2003-11-23 devnull }
162 b8c14089 2003-11-23 devnull 
163 b8c14089 2003-11-23 devnull int
164 b8c14089 2003-11-23 devnull verbisfile(int obj, Plumbmsg *m, Rule *r, Exec *e, ulong maskon, ulong maskoff, char **var)
165 b8c14089 2003-11-23 devnull {
166 b8c14089 2003-11-23 devnull 	char *file;
167 b8c14089 2003-11-23 devnull 
168 b8c14089 2003-11-23 devnull 	switch(obj){
169 b8c14089 2003-11-23 devnull 	default:
170 b8c14089 2003-11-23 devnull 		fprint(2, "unimplemented 'isfile' object %d\n", obj);
171 b8c14089 2003-11-23 devnull 		break;
172 b8c14089 2003-11-23 devnull 	case OArg:
173 b8c14089 2003-11-23 devnull 		file = absolute(m->wdir, expand(e, r->arg, nil));
174 b8c14089 2003-11-23 devnull 		if(isfile(file, maskon, maskoff)){
175 b8c14089 2003-11-23 devnull 			*var = file;
176 b8c14089 2003-11-23 devnull 			return 1;
177 b8c14089 2003-11-23 devnull 		}
178 b8c14089 2003-11-23 devnull 		free(file);
179 b8c14089 2003-11-23 devnull 		break;
180 b8c14089 2003-11-23 devnull 	case OData:
181 b8c14089 2003-11-23 devnull 	case OWdir:
182 b8c14089 2003-11-23 devnull 		file = absolute(m->wdir, obj==OData? m->data : m->wdir);
183 b8c14089 2003-11-23 devnull 		if(isfile(file, maskon, maskoff)){
184 b8c14089 2003-11-23 devnull 			*var = file;
185 b8c14089 2003-11-23 devnull 			return 1;
186 b8c14089 2003-11-23 devnull 		}
187 b8c14089 2003-11-23 devnull 		free(file);
188 b8c14089 2003-11-23 devnull 		break;
189 b8c14089 2003-11-23 devnull 	}
190 b8c14089 2003-11-23 devnull 	return 0;
191 b8c14089 2003-11-23 devnull }
192 b8c14089 2003-11-23 devnull 
193 b8c14089 2003-11-23 devnull int
194 b8c14089 2003-11-23 devnull verbset(int obj, Plumbmsg *m, Rule *r, Exec *e)
195 b8c14089 2003-11-23 devnull {
196 b8c14089 2003-11-23 devnull 	char *new;
197 b8c14089 2003-11-23 devnull 
198 b8c14089 2003-11-23 devnull 	switch(obj){
199 b8c14089 2003-11-23 devnull 	default:
200 b8c14089 2003-11-23 devnull 		fprint(2, "unimplemented 'is' object %d\n", obj);
201 b8c14089 2003-11-23 devnull 		break;
202 b8c14089 2003-11-23 devnull 	case OData:
203 b8c14089 2003-11-23 devnull 		new = estrdup(expand(e, r->arg, nil));
204 b8c14089 2003-11-23 devnull 		m->ndata = strlen(new);
205 b8c14089 2003-11-23 devnull 		free(m->data);
206 b8c14089 2003-11-23 devnull 		m->data = new;
207 b8c14089 2003-11-23 devnull 		e->p0 = -1;
208 b8c14089 2003-11-23 devnull 		e->p1 = -1;
209 b8c14089 2003-11-23 devnull 		e->setdata = 0;
210 b8c14089 2003-11-23 devnull 		return 1;
211 b8c14089 2003-11-23 devnull 	case ODst:
212 b8c14089 2003-11-23 devnull 		new = estrdup(expand(e, r->arg, nil));
213 b8c14089 2003-11-23 devnull 		free(m->dst);
214 b8c14089 2003-11-23 devnull 		m->dst = new;
215 b8c14089 2003-11-23 devnull 		return 1;
216 b8c14089 2003-11-23 devnull 	case OType:
217 b8c14089 2003-11-23 devnull 		new = estrdup(expand(e, r->arg, nil));
218 b8c14089 2003-11-23 devnull 		free(m->type);
219 b8c14089 2003-11-23 devnull 		m->type = new;
220 b8c14089 2003-11-23 devnull 		return 1;
221 b8c14089 2003-11-23 devnull 	case OWdir:
222 b8c14089 2003-11-23 devnull 		new = estrdup(expand(e, r->arg, nil));
223 b8c14089 2003-11-23 devnull 		free(m->wdir);
224 b8c14089 2003-11-23 devnull 		m->wdir = new;
225 b8c14089 2003-11-23 devnull 		return 1;
226 b8c14089 2003-11-23 devnull 	case OSrc:
227 b8c14089 2003-11-23 devnull 		new = estrdup(expand(e, r->arg, nil));
228 b8c14089 2003-11-23 devnull 		free(m->src);
229 b8c14089 2003-11-23 devnull 		m->src = new;
230 b8c14089 2003-11-23 devnull 		return 1;
231 b8c14089 2003-11-23 devnull 	}
232 b8c14089 2003-11-23 devnull 	return 0;
233 b8c14089 2003-11-23 devnull }
234 b8c14089 2003-11-23 devnull 
235 b8c14089 2003-11-23 devnull int
236 b8c14089 2003-11-23 devnull verbadd(int obj, Plumbmsg *m, Rule *r, Exec *e)
237 b8c14089 2003-11-23 devnull {
238 b8c14089 2003-11-23 devnull 	switch(obj){
239 b8c14089 2003-11-23 devnull 	default:
240 b8c14089 2003-11-23 devnull 		fprint(2, "unimplemented 'add' object %d\n", obj);
241 b8c14089 2003-11-23 devnull 		break;
242 b8c14089 2003-11-23 devnull 	case OAttr:
243 b8c14089 2003-11-23 devnull 		m->attr = plumbaddattr(m->attr, plumbunpackattr(expand(e, r->arg, nil)));
244 b8c14089 2003-11-23 devnull 		return 1;
245 b8c14089 2003-11-23 devnull 	}
246 b8c14089 2003-11-23 devnull 	return 0;
247 b8c14089 2003-11-23 devnull }
248 b8c14089 2003-11-23 devnull 
249 b8c14089 2003-11-23 devnull int
250 b8c14089 2003-11-23 devnull verbdelete(int obj, Plumbmsg *m, Rule *r, Exec *e)
251 b8c14089 2003-11-23 devnull {
252 b8c14089 2003-11-23 devnull 	char *a;
253 b8c14089 2003-11-23 devnull 
254 b8c14089 2003-11-23 devnull 	switch(obj){
255 b8c14089 2003-11-23 devnull 	default:
256 b8c14089 2003-11-23 devnull 		fprint(2, "unimplemented 'delete' object %d\n", obj);
257 b8c14089 2003-11-23 devnull 		break;
258 b8c14089 2003-11-23 devnull 	case OAttr:
259 b8c14089 2003-11-23 devnull 		a = expand(e, r->arg, nil);
260 b8c14089 2003-11-23 devnull 		if(plumblookup(m->attr, a) == nil)
261 b8c14089 2003-11-23 devnull 			break;
262 b8c14089 2003-11-23 devnull 		m->attr = plumbdelattr(m->attr, a);
263 b8c14089 2003-11-23 devnull 		return 1;
264 b8c14089 2003-11-23 devnull 	}
265 b8c14089 2003-11-23 devnull 	return 0;
266 b8c14089 2003-11-23 devnull }
267 b8c14089 2003-11-23 devnull 
268 b8c14089 2003-11-23 devnull int
269 b8c14089 2003-11-23 devnull matchpat(Plumbmsg *m, Exec *e, Rule *r)
270 b8c14089 2003-11-23 devnull {
271 b8c14089 2003-11-23 devnull 	switch(r->verb){
272 b8c14089 2003-11-23 devnull 	default:
273 b8c14089 2003-11-23 devnull 		fprint(2, "unimplemented verb %d\n", r->verb);
274 b8c14089 2003-11-23 devnull 		break;
275 b8c14089 2003-11-23 devnull 	case VAdd:
276 b8c14089 2003-11-23 devnull 		return verbadd(r->obj, m, r, e);
277 b8c14089 2003-11-23 devnull 	case VDelete:
278 b8c14089 2003-11-23 devnull 		return verbdelete(r->obj, m, r, e);
279 b8c14089 2003-11-23 devnull 	case VIs:
280 b8c14089 2003-11-23 devnull 		return verbis(r->obj, m, r);
281 b8c14089 2003-11-23 devnull 	case VIsdir:
282 b8c14089 2003-11-23 devnull 		return verbisfile(r->obj, m, r, e, DMDIR, 0, &e->dir);
283 b8c14089 2003-11-23 devnull 	case VIsfile:
284 b8c14089 2003-11-23 devnull 		return verbisfile(r->obj, m, r, e, ~DMDIR, DMDIR, &e->file);
285 b8c14089 2003-11-23 devnull 	case VMatches:
286 b8c14089 2003-11-23 devnull 		return verbmatches(r->obj, m, r, e);
287 b8c14089 2003-11-23 devnull 	case VSet:
288 b8c14089 2003-11-23 devnull 		verbset(r->obj, m, r, e);
289 b8c14089 2003-11-23 devnull 		return 1;
290 b8c14089 2003-11-23 devnull 	}
291 b8c14089 2003-11-23 devnull 	return 0;
292 b8c14089 2003-11-23 devnull }
293 b8c14089 2003-11-23 devnull 
294 b8c14089 2003-11-23 devnull void
295 b8c14089 2003-11-23 devnull freeexec(Exec *exec)
296 b8c14089 2003-11-23 devnull {
297 b8c14089 2003-11-23 devnull 	int i;
298 b8c14089 2003-11-23 devnull 
299 b8c14089 2003-11-23 devnull 	if(exec == nil)
300 b8c14089 2003-11-23 devnull 		return;
301 b8c14089 2003-11-23 devnull 	free(exec->dir);
302 b8c14089 2003-11-23 devnull 	free(exec->file);
303 b8c14089 2003-11-23 devnull 	for(i=0; i<10; i++)
304 b8c14089 2003-11-23 devnull 		free(exec->match[i]);
305 b8c14089 2003-11-23 devnull 	free(exec);
306 b8c14089 2003-11-23 devnull }
307 b8c14089 2003-11-23 devnull 
308 b8c14089 2003-11-23 devnull Exec*
309 b8c14089 2003-11-23 devnull newexec(Plumbmsg *m)
310 b8c14089 2003-11-23 devnull {
311 b8c14089 2003-11-23 devnull 	Exec *exec;
312 fa325e9b 2020-01-10 cross 
313 b8c14089 2003-11-23 devnull 	exec = emalloc(sizeof(Exec));
314 b8c14089 2003-11-23 devnull 	exec->msg = m;
315 b8c14089 2003-11-23 devnull 	exec->p0 = -1;
316 b8c14089 2003-11-23 devnull 	exec->p1 = -1;
317 b8c14089 2003-11-23 devnull 	return exec;
318 b8c14089 2003-11-23 devnull }
319 b8c14089 2003-11-23 devnull 
320 b8c14089 2003-11-23 devnull void
321 b8c14089 2003-11-23 devnull rewrite(Plumbmsg *m, Exec *e)
322 b8c14089 2003-11-23 devnull {
323 b8c14089 2003-11-23 devnull 	Plumbattr *a, *prev;
324 b8c14089 2003-11-23 devnull 
325 b8c14089 2003-11-23 devnull 	if(e->clearclick){
326 b8c14089 2003-11-23 devnull 		prev = nil;
327 b8c14089 2003-11-23 devnull 		for(a=m->attr; a!=nil; a=a->next){
328 b8c14089 2003-11-23 devnull 			if(strcmp(a->name, "click") == 0){
329 b8c14089 2003-11-23 devnull 				if(prev == nil)
330 b8c14089 2003-11-23 devnull 					m->attr = a->next;
331 b8c14089 2003-11-23 devnull 				else
332 b8c14089 2003-11-23 devnull 					prev->next = a->next;
333 b8c14089 2003-11-23 devnull 				free(a->name);
334 fa325e9b 2020-01-10 cross 				free(a->value);
335 b8c14089 2003-11-23 devnull 				free(a);
336 b8c14089 2003-11-23 devnull 				break;
337 b8c14089 2003-11-23 devnull 			}
338 b8c14089 2003-11-23 devnull 			prev = a;
339 b8c14089 2003-11-23 devnull 		}
340 b8c14089 2003-11-23 devnull 		if(e->setdata){
341 b8c14089 2003-11-23 devnull 			free(m->data);
342 b8c14089 2003-11-23 devnull 			m->data = estrdup(expand(e, "$0", nil));
343 b8c14089 2003-11-23 devnull 			m->ndata = strlen(m->data);
344 b8c14089 2003-11-23 devnull 		}
345 b8c14089 2003-11-23 devnull 	}
346 b8c14089 2003-11-23 devnull }
347 b8c14089 2003-11-23 devnull 
348 b8c14089 2003-11-23 devnull char**
349 b8c14089 2003-11-23 devnull buildargv(char *s, Exec *e)
350 b8c14089 2003-11-23 devnull {
351 b8c14089 2003-11-23 devnull 	char **av;
352 b8c14089 2003-11-23 devnull 	int ac;
353 b8c14089 2003-11-23 devnull 
354 b8c14089 2003-11-23 devnull 	ac = 0;
355 b8c14089 2003-11-23 devnull 	av = nil;
356 b8c14089 2003-11-23 devnull 	for(;;){
357 b8c14089 2003-11-23 devnull 		av = erealloc(av, (ac+1) * sizeof(char*));
358 b8c14089 2003-11-23 devnull 		av[ac] = nil;
359 b8c14089 2003-11-23 devnull 		while(*s==' ' || *s=='\t')
360 b8c14089 2003-11-23 devnull 			s++;
361 b8c14089 2003-11-23 devnull 		if(*s == '\0')
362 b8c14089 2003-11-23 devnull 			break;
363 b8c14089 2003-11-23 devnull 		av[ac++] = estrdup(expand(e, s, &s));
364 b8c14089 2003-11-23 devnull 	}
365 b8c14089 2003-11-23 devnull 	return av;
366 b8c14089 2003-11-23 devnull }
367 b8c14089 2003-11-23 devnull 
368 b8c14089 2003-11-23 devnull Exec*
369 b8c14089 2003-11-23 devnull matchruleset(Plumbmsg *m, Ruleset *rs)
370 b8c14089 2003-11-23 devnull {
371 b8c14089 2003-11-23 devnull 	int i;
372 b8c14089 2003-11-23 devnull 	Exec *exec;
373 b8c14089 2003-11-23 devnull 
374 b8c14089 2003-11-23 devnull 	if(m->dst!=nil && m->dst[0]!='\0' && rs->port!=nil && strcmp(m->dst, rs->port)!=0)
375 b8c14089 2003-11-23 devnull 		return nil;
376 b8c14089 2003-11-23 devnull 	exec = newexec(m);
377 b8c14089 2003-11-23 devnull 	for(i=0; i<rs->npat; i++)
378 b8c14089 2003-11-23 devnull 		if(!matchpat(m, exec, rs->pat[i])){
379 b8c14089 2003-11-23 devnull 			freeexec(exec);
380 b8c14089 2003-11-23 devnull 			return nil;
381 b8c14089 2003-11-23 devnull 		}
382 b8c14089 2003-11-23 devnull 	if(rs->port!=nil && (m->dst==nil || m->dst[0]=='\0')){
383 b8c14089 2003-11-23 devnull 		free(m->dst);
384 b8c14089 2003-11-23 devnull 		m->dst = estrdup(rs->port);
385 b8c14089 2003-11-23 devnull 	}
386 b8c14089 2003-11-23 devnull 	rewrite(m, exec);
387 b8c14089 2003-11-23 devnull 	return exec;
388 b8c14089 2003-11-23 devnull }
389 b8c14089 2003-11-23 devnull 
390 b8c14089 2003-11-23 devnull enum
391 b8c14089 2003-11-23 devnull {
392 b8c14089 2003-11-23 devnull 	NARGS		= 100,
393 b8c14089 2003-11-23 devnull 	NARGCHAR	= 8*1024,
394 32f69c36 2003-12-11 devnull 	EXECSTACK 	= 32*1024+(NARGS+1)*sizeof(char*)+NARGCHAR
395 b8c14089 2003-11-23 devnull };
396 b8c14089 2003-11-23 devnull 
397 b8c14089 2003-11-23 devnull /* copy argv to stack and free the incoming strings, so we don't leak argument vectors */
398 b8c14089 2003-11-23 devnull void
399 b8c14089 2003-11-23 devnull stackargv(char **inargv, char *argv[NARGS+1], char args[NARGCHAR])
400 b8c14089 2003-11-23 devnull {
401 b8c14089 2003-11-23 devnull 	int i, n;
402 b8c14089 2003-11-23 devnull 	char *s, *a;
403 b8c14089 2003-11-23 devnull 
404 b8c14089 2003-11-23 devnull 	s = args;
405 b8c14089 2003-11-23 devnull 	for(i=0; i<NARGS; i++){
406 b8c14089 2003-11-23 devnull 		a = inargv[i];
407 b8c14089 2003-11-23 devnull 		if(a == nil)
408 b8c14089 2003-11-23 devnull 			break;
409 b8c14089 2003-11-23 devnull 		n = strlen(a)+1;
410 b8c14089 2003-11-23 devnull 		if((s-args)+n >= NARGCHAR)	/* too many characters */
411 b8c14089 2003-11-23 devnull 			break;
412 b8c14089 2003-11-23 devnull 		argv[i] = s;
413 b8c14089 2003-11-23 devnull 		memmove(s, a, n);
414 b8c14089 2003-11-23 devnull 		s += n;
415 b8c14089 2003-11-23 devnull 		free(a);
416 b8c14089 2003-11-23 devnull 	}
417 b8c14089 2003-11-23 devnull 	argv[i] = nil;
418 b8c14089 2003-11-23 devnull }
419 b8c14089 2003-11-23 devnull 
420 b8c14089 2003-11-23 devnull 
421 b8c14089 2003-11-23 devnull void
422 b8c14089 2003-11-23 devnull execproc(void *v)
423 b8c14089 2003-11-23 devnull {
424 32f69c36 2003-12-11 devnull 	int fd[3];
425 b8c14089 2003-11-23 devnull 	char **av;
426 32f69c36 2003-12-11 devnull 	char *args[NARGS+1], argc[NARGCHAR];
427 b8c14089 2003-11-23 devnull 
428 32f69c36 2003-12-11 devnull 	fd[0] = open("/dev/null", OREAD);
429 32f69c36 2003-12-11 devnull 	fd[1] = dup(1, -1);
430 32f69c36 2003-12-11 devnull 	fd[2] = dup(2, -1);
431 b8c14089 2003-11-23 devnull 	av = v;
432 b8c14089 2003-11-23 devnull 	stackargv(av, args, argc);
433 b8c14089 2003-11-23 devnull 	free(av);
434 f063dad9 2004-02-29 devnull 	threadexec(nil, fd, args[0], args);
435 b8c14089 2003-11-23 devnull 	threadexits("can't exec");
436 b8c14089 2003-11-23 devnull }
437 b8c14089 2003-11-23 devnull 
438 b8c14089 2003-11-23 devnull char*
439 b8c14089 2003-11-23 devnull startup(Ruleset *rs, Exec *e)
440 b8c14089 2003-11-23 devnull {
441 b8c14089 2003-11-23 devnull 	char **argv;
442 b8c14089 2003-11-23 devnull 	int i;
443 b8c14089 2003-11-23 devnull 
444 b8c14089 2003-11-23 devnull 	if(rs != nil)
445 b8c14089 2003-11-23 devnull 		for(i=0; i<rs->nact; i++){
446 b8c14089 2003-11-23 devnull 			if(rs->act[i]->verb == VStart)
447 b8c14089 2003-11-23 devnull 				goto Found;
448 b8c14089 2003-11-23 devnull 			if(rs->act[i]->verb == VClient){
449 b8c14089 2003-11-23 devnull 				if(e->msg->dst==nil || e->msg->dst[0]=='\0')
450 b8c14089 2003-11-23 devnull 					return "no port for \"client\" rule";
451 b8c14089 2003-11-23 devnull 				e->holdforclient = 1;
452 b8c14089 2003-11-23 devnull 				goto Found;
453 b8c14089 2003-11-23 devnull 			}
454 b8c14089 2003-11-23 devnull 		}
455 b8c14089 2003-11-23 devnull 	return "no start action for plumb message";
456 b8c14089 2003-11-23 devnull 
457 b8c14089 2003-11-23 devnull Found:
458 b8c14089 2003-11-23 devnull 	argv = buildargv(rs->act[i]->arg, e);
459 b8c14089 2003-11-23 devnull 	if(argv[0] == nil)
460 b8c14089 2003-11-23 devnull 		return "empty argument list";
461 f063dad9 2004-02-29 devnull 	threadcreate(execproc, argv, EXECSTACK);
462 b8c14089 2003-11-23 devnull 	return nil;
463 b8c14089 2003-11-23 devnull }